.banner{
    width: 100%;
    height: auto;
    overflow: hidden;
}
.banner img{
    width: 100%;
}
.dianLiang{
    width: 92%;

    margin:0 4%;
}
.dianLiang ul{


}
.dianLiang ul li a{
    display: block;
}
.dianLiang ul li {
    float: left;
    width: 48%;
    margin-bottom: 5px;
}

.dianLiang ul li:nth-child(2){
    float: right;
}
.dianLiang ul li:nth-child(4){
    float: right;
}
.a_icon img {
    width: 100%;
}